Union Government
(1) If at any time, except when both Houses of Parliament are in session, the President is satisfied that circumstances exist which render it necessary for him to take immediate action, he may promulgate such Ordinances as the circumstances appear to him to require. (2) An Ordinance has the same force as an Act of Parliament, but every such Ordinance - (a) must be laid before both Houses and ceases to operate six weeks after Parliament reassembles (or earlier if both Houses pass resolutions disapproving it); and (b) may be withdrawn at any time by the President. (3) An Ordinance is void to the extent it makes provision Parliament itself would not be competent to enact.
When Parliament isn't in session and the government believes urgent action is needed, the President (acting on the Council of Ministers' advice) can issue an Ordinance - a law-like instrument with the same immediate legal force as an Act of Parliament. But it's temporary: it automatically expires six weeks after Parliament next reassembles unless Parliament actually passes it as a proper law before then.
Governments have sometimes been criticised for repeatedly re-issuing the same Ordinance every time it's about to lapse, without ever bringing it to Parliament for a real vote - courts have held that routinely repromulgating Ordinances this way, without genuine legislative intent, can amount to a fraud on the Constitution.